Question

The concrete used for cement concrete roads is of grade ___________

(a) M 10

(b) M 15

(c) M 20

(d) M 35

The question was posed to me by my school teacher while I was bunking the class.

My doubt stems from Labour and Rate Analysis in chapter Rate Analysis, Estimation and Costing of Construction & Building Materials

Answer 1

Correct option is (b) M 15

The explanation: The concrete used for cement concrete roads is of grade M 15 using 20 mm hand broken grade metal. For base course, concrete of 1:4:8 is used using 40 mm HBG metal.